Cisco 1721 Private WAN Config - no packets routing

[NonProphet]

What am I missing?
I have two Cisco 1721's over leased fractional T1 (v.35 from CSU/DSU interfaced to WIC-1T serials)
I'm using HDLC encapsulation over the line. Each interface has an IP with the serials on a separate subnet. I used Cisco Config Maker to configure and delilver the configuration to each router. Using RIP2 routing protocol.

The problem:
No packets are being routed over the WAN.
From each end of the WAN, I can ping Eth0, but not Ser0. I can telnet into one router and ping the Ser0 interface on the other! But I can't ping the Ser0 Interface from the Eth0 interface on the same router(?) I've tried both Dynamic and Static routing. If I have to guess, (and I do!) I'd say it has to be a routing table issue.

(Is there blood dripping from my ears?)

Obviously I'm missing something basic here. This is my first leased-line point to point router config.

 

[IPKONFIG]

Why don't you post your configs and we'll take a look at what you have. A "show ip route" from both routers would be nice too.

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[NonProphet]

Here is the show ip route for router 1:

Router1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/24 is subnetted, 2 subnets
C 10.237.1.0 is directly connected, Serial0
C 10.237.0.0 is directly connected, FastEthernet0
_________________________________________________________
Same from router 2:
NORHLC-WAN#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/24 is subnetted, 2 subnets
C 10.237.128.0 is directly connected, FastEthernet0
C 10.237.1.0 is directly connected, Serial0

What's a "Gateway of last resort"?

 

[NonProphet]

Router 1 config
!
service timestamps debug uptime
service timestamps log uptime
service password-encryption
no service tcp-small-servers
no service udp-small-servers
!
hostname Router1
!
enable password xxxxxxxx
!
no ip name-server
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface FastEthernet 0
no shutdown
description connected to Switch
ip address 10.237.0.2 255.255.255.0
keepalive 10
!
interface Serial 0
no shutdown
description connected to Router2
ip address 10.237.1.4 255.255.255.0
encapsulation hdlc
!
router rip
version 2
network 10.0.0.0
no auto-summary
!
!
ip classless
ip http server
snmp-server community public RO
snmp-server location XXXXXXXXXXXXXXX
snmp-xxxxxxxxxxxxxxxxxxxxxxxxx
!
line console 0
exec-timeout 0 0
password xxxxxxxxxxxx
login
!
line vty 0
password XXXXXXXXXXX
login
!
end

_______________________________________________
Router 2 config:
!
service timestamps debug uptime
service timestamps log uptime
service password-encryption
no service tcp-small-servers
no service udp-small-servers
!
hostname Router2
!
enable password XXXXXXXXXXXx
!
no ip name-server
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface FastEthernet 0
no shutdown
description connected to Hub
ip address 10.237.128.2 255.255.255.0
keepalive 10
!
interface Serial 0
no shutdown
description connected to Router1
ip address 10.237.1.3 255.255.255.0
encapsulation hdlc
!
router rip
version 2
network 10.0.0.0
no auto-summary
!
!
ip classless
no ip http server
snmp-server community public RO
snmp-server location XXXXXXXXXXXXX
snmp-server contact XXXXXXXXXXXXXXXXXXXXXXXXXXXXXx
!
line console 0
exec-timeout 0 0
password xxxxxxxxxx
login
!
line vty 0 4
password xxxxxxxxx
login
!
end

 

[tschouten]

Ok the gateway of last resort is where the router sends packets that it has no clue of where they go, which is normally valid internet addresses (IE your ISPs router). That is a very simplified explenation but it should clear the confusion abit as to what it is, another way to look at it is the router says I have packet xyz, I don't have any xyz in my routing table (if you have gateway of last resort enabled) sending packet xyz to gateway of last resort. If your gateway of last resort isn't configured it will then drop the packet.

 

[tschouten]

However, looking at your configuration you should be able to contact both areas.

 

[tschouten]

Spotted it,

here is your problem

ip routing

diable this

no ip routing

 

[tschouten]

Sorry, wait that shouldn't cause a problem. Brain not working again, looking at too many things at once.Need to stop doing that, ignore the previous post. It won't fix anything but you don't need it enabled anyhow.

 

[jimmyzz]

NonProphet/tschouten,
I would leave the ip routing command enabled, otherwise your router effectively becomes a "bridge".

First I would check the end to end connectivity but using static routes. Remove rip from both routers and setup a default static routes on each router.

R1:
ip route 0.0.0.0 0.0.0.0 10.237.1.3

R2:
ip route 0.0.0.0 0.0.0.0 10.237.1.4

If the end to end test works, then you can move onto setting up dynamic routing. This way, you can isolate where the problem is. If both are cisco routers, I would use eigrp over rip.

JimmyZ

 

[tschouten]

Jimmyz

He already has RIP configured. All ip routing does is enable routing if you plan to use no routing protocol. In order to turn a router into a bridge you would have to perform bridging commands. (ie create a bridge group and apply it to an interface)

 

[tschouten]

Ok here is something I should have thought of a LONNNNGGGGGGG time ago. Could you post a show of you Serial interfaces. Wondering if the timing is set for these things? Are there any alarams on your CSU/DSU's showing, look at the front of it there should be a light for alarms if it is lit you may not be getting aorrect timing or an active link. (Why the hell do I not think of basic things first). Your config is fine, granted you don't need ip routing enabled but that truthfuly doesn't hurt anything. Sorry for sooooo many posts, I wasn't giving the problem my full attention (which I have been doing a lot of lately). Working on too many things at once, but honestly check to see if the CSU/DSUs are live and set correctly. IF you don't know whte correct settings contact your provider they will help you with that part. Let me know if this suggestions doesn't pan out, because looking at your configuration it will work you just aren't getting live connection between the two devices.

 

[tschouten]

Also, issue a

show controllers ser 0 for both routers (If there is no alarm on the csu/dsu)

 

[jimmyzz]

tschouten,
I was under the impression that if you configured "no ip routing" then effectively you disable all your routing capabilities on the router, including running dynamic routing protocols such as RIP. If you got a spare router to play with, you should try it. You should get an error message "IP routing not enabled" when you try to setup a routing protocol such as RIP. My reference to "bridge" was more an analagy than to setting up bridging itself.

In regard to NonProphet's issue, I believe he has WAN connectivity but has a routing issue. I would recommend the KISS method (Keep It Simple S**), remove the dynamic routing protocol and setup a basic static routing between the two WAN routers. When he can get this working, he eliminates one issue (ie. the WAN) and then can get onto configuring dynamic routing. Checking the serial interface status would be a good start as you have recommended.

NonProphet,
Hope you can try our recommendations and let us know how you go.

JimmyZ

 

[philmcgarry]

can you post the sh int serial0 from both routers. You need layer 2 connectivity over the leased line before you think about ip routing. Both interfaces need to be in an up/up state and be transferring clocking frames. Try an extended ping using the serial interface as your source address. also check the sh contr serial 0 command and check the dtr is up.

Cheers

 

[tschouten]

Agrees with philmcgarry

Jimmyzz you are right, not sure what the hell I was thinking now when I was refering to the ip routing. The only thing I can think of was that older IOS's ip routing was not automatically enabled or perhaps it didn't show up on the config therefore you didn't need it...I can't explain my thought on that one now....I am loooosing my mind. Jimmyzz is correct when he says you need ip routing enabled in order to set routing protocols. (still questioning myself on what the hell was I thinking?) But for two routers Rip version 2 is just fine and his configuration will work.

However, I still think there is a clocking issue or perhaps a line issue somewhere. That is why I recomended posting the show interface serial 0, and show controllers serial 0. Wanted to see what the interface was stating, it isn't a routing issue. His configuration is fine. (Though now that Jimmyzz has corrected my short sightedness I am second guessing myself...hate it when that happens).

 

[NonProphet]

No alarm lights on the CSU/DSUs (Kentrox DataSmart 658)

Here we go, Router1 (sh controllers ser0
Interface Serial0
Hardware is PowerQUICC MPC860
DTE V.35 TX and RX clocks detected.
idb at 0x810BCE54, driver data structure at 0x810A3034
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x06
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:
Config [CICR]=0x00365F80, Pending [CIPR]=0x00008000
Mask [CIMR]=0x40204000, In-srv [CISR]=0x00000000
Command register [CR]=0x600
Port A [PADIR]=0x0000, [PAPAR]=0x0903
[PAODR]=0x0000, [PADAT]=0xFFFF
Port B [PBDIR]=0x0180F, [PBPAR]=0x0E00E
[PBODR]=0x00000, [PBDAT]=0x3077C
Port C [PCDIR]=0x000, [PCPAR]=0x000
[PCSO]=0x020, [PCDAT]=0xFCE, [PCINT]=0x000
Receive Ring
rmd(FF002430): status 9000 length 1A address 1CB0344
rmd(FF002438): status 9000 length 18A address 1CB09C4
rmd(FF002440): status 9000 length 1A address 1CB1044
rmd(FF002448): status 9000 length 1A address 1CB16C4
rmd(FF002450): status 9000 length 1A address 1CAAEC4
rmd(FF002458): status 9000 length 1A address 1CABBC4
rmd(FF002460): status 9000 length 1A address 1CAC244
rmd(FF002468): status 9000 length 1A address 1CAC8C4
rmd(FF002470): status 9000 length 1A address 1CACF44
rmd(FF002478): status 9000 length 1A address 1CAD5C4
rmd(FF002480): status 9000 length 18A address 1CADC44
rmd(FF002488): status 9000 length 1A address 1CAE2C4
rmd(FF002490): status 9000 length 1A address 1CAE944
rmd(FF002498): status 9000 length 1A address 1CAEFC4
rmd(FF0024A0): status 9000 length 1A address 1CAF644
rmd(FF0024A8): status B000 length 1A address 1CAFCC4
Transmit Ring
tmd(FF0024B0): status 5C00 length 124 address 1CBDA54
tmd(FF0024B8): status 5C00 length 18 address 1CB8554
tmd(FF0024C0): status 5C00 length 18 address 1CB9314
tmd(FF0024C8): status 5C00 length 18 address 1B6D5D4
tmd(FF0024D0): status 5C00 length 18 address 1CB9D14
tmd(FF0024D8): status 5C00 length 18 address 1B6D5D4
tmd(FF0024E0): status 5C00 length 18 address 1CB8554
tmd(FF0024E8): status 5C00 length 124 address 1CBE814
tmd(FF0024F0): status 5C00 length 18 address 1B6EED4
tmd(FF0024F8): status 5C00 length 18 address 1CB8A54
tmd(FF002500): status 5C00 length 18 address 1B6D5D4
tmd(FF002508): status 5C00 length 18 address 1CB8914
tmd(FF002510): status 5C00 length 18 address 1CB9454
tmd(FF002518): status 5C00 length 124 address 1CC7194
tmd(FF002520): status 5C00 length 18 address 1B6E754
tmd(FF002528): status 7C00 length 18 address 1CB87D4

tx_limited=1(2)

SCC GENERAL PARAMETER RAM (at 0xFF003C00)
Rx BD Base [RBASE]=0x2430, Fn Code [RFCR]=0x18
Tx BD Base [TBASE]=0x24B0, Fn Code [TFCR]=0x18
Max Rx Buff Len [MRBLR]=1548
Rx State [RSTATE]=0x18008440, BD Ptr [RBPTR]=0x2468
Tx State [TSTATE]=0x18000548, BD Ptr [TBPTR]=0x2518

SCC HDLC PARAMETER RAM (at 0xFF003C38)
CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8
Errors: CRC [CRCEC]=0, Aborts [ABTSC]=0, Discards [DISFC]=0
Nonmatch Addr Cntr [NMARC]=0
Retry Count [RETRC]=0
Max Frame Length [MFLR]=1608
Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=58313
User-defined Address 0000/0000/0000/0000
User-defined Address Mask 0x0000


buffer size 1524

PowerQUICC SCC specific errors:
0 input aborts on receiving flag sequence
0 throttles, 0 enables
0 overruns
0 transmitter underruns
0 transmitter CTS losts
_________________________________________________________
Router2 (sh controllers ser0
Interface Serial0
Hardware is PowerQUICC MPC860
DTE V.35 TX and RX clocks detected.
idb at 0x80C11744, driver data structure at 0x80C19248
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x06
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:
Config [CICR]=0x00365F80, Pending [CIPR]=0x00008000
Mask [CIMR]=0x40204000, In-srv [CISR]=0x00000000
Command register [CR]=0x600
Port A [PADIR]=0x0000, [PAPAR]=0x0903
[PAODR]=0x0000, [PADAT]=0xFFFF
Port B [PBDIR]=0x0180F, [PBPAR]=0x0E00E
[PBODR]=0x00000, [PBDAT]=0x3077C
Port C [PCDIR]=0x000, [PCPAR]=0x000
[PCSO]=0x020, [PCDAT]=0xFCE, [PCINT]=0x000
Receive Ring
rmd(FF002230): status 9000 length 2E address 1E3A944
rmd(FF002238): status 9000 length 2F address 1E3AFC4
rmd(FF002240): status 9000 length 2E address 1E38F44
rmd(FF002248): status 9000 length 2F address 1E395C4
rmd(FF002250): status 9000 length 2F address 1E37544
rmd(FF002258): status 9000 length 2F address 1E39C44
rmd(FF002260): status 9000 length 2E address 1E388C4
rmd(FF002268): status 9000 length 2F address 1E3D6C4
rmd(FF002270): status 9000 length 2E address 1E3C9C4
rmd(FF002278): status 9000 length 30 address 1E3D044
rmd(FF002280): status 9000 length 2E address 1E3DD44
rmd(FF002288): status 9000 length 2F address 1E37BC4
rmd(FF002290): status 9000 length 2F address 1E3A2C4
rmd(FF002298): status 9000 length 2F address 1E3C344
rmd(FF0022A0): status 9000 length 2F address 1E3BCC4
rmd(FF0022A8): status B000 length 2F address 1E3B644
Transmit Ring
tmd(FF0022B0): status 5C00 length 2D address 1E40354
tmd(FF0022B8): status 5C00 length 2D address 1E40354
tmd(FF0022C0): status 5C00 length 2D address 1E40354
tmd(FF0022C8): status 5C00 length 2D address 1E40354
tmd(FF0022D0): status 5C00 length 2D address 1E40354
tmd(FF0022D8): status 5C00 length 2D address 1E40354
tmd(FF0022E0): status 5C00 length 2E address 1E40354
tmd(FF0022E8): status 5C00 length 25C address 1E409D4
tmd(FF0022F0): status 5C00 length 25C address 1E41394
tmd(FF0022F8): status DC00 length 25C address 1E41054
tmd(FF002300): status 5C00 length 2D address 1E40354
tmd(FF002308): status 5C00 length 2D address 1E40354
tmd(FF002310): status 5C00 length 2D address 1E40354
tmd(FF002318): status 5C00 length 2D address 1E40354
tmd(FF002320): status 5C00 length 2D address 1E40354
tmd(FF002328): status 7C00 length 2D address 1E40354

tx_limited=1(2)

SCC GENERAL PARAMETER RAM (at 0xFF003C00)
Rx BD Base [RBASE]=0x2230, Fn Code [RFCR]=0x18
Tx BD Base [TBASE]=0x22B0, Fn Code [TFCR]=0x18
Max Rx Buff Len [MRBLR]=1548
Rx State [RSTATE]=0x18008440, BD Ptr [RBPTR]=0x2278
Tx State [TSTATE]=0x18000548, BD Ptr [TBPTR]=0x22F0

SCC HDLC PARAMETER RAM (at 0xFF003C38)
CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8
Errors: CRC [CRCEC]=0, Aborts [ABTSC]=0, Discards [DISFC]=0
Nonmatch Addr Cntr [NMARC]=0
Retry Count [RETRC]=0
Max Frame Length [MFLR]=1608
Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=58220
User-defined Address 0000/0000/0000/0000
User-defined Address Mask 0x0000


buffer size 1524

PowerQUICC SCC specific errors:
412 input aborts on receiving flag sequence
0 throttles, 0 enables
0 overruns
0 transmitter underruns
0 transmitter CTS losts

 

[NonProphet]

Router 2 (sh int ser0)
Serial0 is up, line protocol is up
Hardware is PowerQUICC Serial
Description: connected to ROUTER1
Internet address is 10.237.1.4/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
429631 packets input, 25730524 bytes, 0 no buffer
Received 331237 broadcasts, 0 runts, 0 giants, 0 throttles
740 input errors, 169 CRC, 159 frame, 0 overrun, 0 ignored, 412 abort
432442 packets output, 30640926 bytes, 0 underruns
0 output errors, 0 collisions, 53 interface resets
0 output buffer failures, 0 output buffers swapped out
10 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
_________________________________________________________
Router 1 (sh int ser0)
Serial0 is up, line protocol is up
Hardware is PowerQUICC Serial
Description: connected to ROUTER2
Internet address is 10.237.1.4/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:05, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
7447 packets input, 570391 bytes, 0 no buffer
Received 7224 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
7461 packets output, 460719 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up



Why is the Internet address the same for both interfaces?

 

[philmcgarry]

nonprophet,

first thing to notice is your ip address on both serial int is the same. This will never work. They need to be on the same subnet, but different addresses. I suggest changing one end to a different address on the 10.237.1.0 subnet.

You also have crc errors. This indicates a faulty interface card somwhere. These will come from your duplicate address.

Make sure you change rip to rip ver 2 under router rip configuration. You are using a VLSM, rip ver 1 does not support this.

First get your ip addressing correct!

Cheers,

Phil McGarry
CCIE

 

[NonProphet]

OK! Sorry about that. It has been corrected. Router2 Serial int is now x.x.x.4 and Router1 serial int is now x.x.x.3 Still no packets routing.

router rip
version 2
network 10.0.0.0
no auto-summary

 

[philmcgarry]

do a clear counters serial 0 on both routers.

can you post a " sh ip int brief " from both routers.

can u do an extended ping, using the serial as the source.
and post the output.

Can you post a tracert route from a client.

cheers